Motor Protection Circuit Breaker

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1 Motor Protection Circuit Breaker Catalogue 2011

CONTENT Introduction...4 Features...4 Parts Identification...5 Technical information (MPCB)...5 Technical information (Aux. contact, Fault signalling contact).

3 CONTENT Introduction...4 Features...4 Parts Identification...5 Technical information (MPCB)...5 Technical information (Aux. contact, Fault signalling contact)...6 Technical information (Under voltage trip, Shunt trip)...6 Motor rating & current setting range...7 Dimension...7 Time current characteristics...8 Let through energy characteristics...8 Add on accessories...9 Circuit diagram...9 Ordering information (MPCB)...10 Ordering information (Add on accessories)...10

4 INTRODUCTION Havells presents the versatile MB2 series motor protection circuit breakers specifically designed for control and protection of motors, conforming to IS / IEC & IS / IEC standards. Motor Circuit Breakers are advanced three pole thermal-magnetic circuit breakers offering excellent short circuit protection by magnetic non adjustable tripping elements under 3ms, this results in rapid build up of an arc voltage which limits the current of the short circuit to a very low level. Infact, this current limiting capability of MB2 motor breakers provides high short circuit breaking capacity upto 100 ka. The thermal elements coupled with automatic ambient temperature compensation over a range of -20 C to +60 C provide close / accurate overload protection qualifying it as a trip class 10 device. The breaker comes with a wide range of add-on accessories to meet variety of application needs in motor circuits and system automation. Operation Motor Circuit Breakers control is manual and local when it is used on its own. However when it is used in conjunction with a contactor, the control is automatic and remote. The ON / OFF actuation is by push button. Switching ON is controlled manually by operating the start button marked I and switching OFF by operating the stop button marked O or automatically by the thermal magnetic protection elements or by a voltage trip add on accessory namely: Shunt trip / Under Voltage Trip (UVT). Protection Motor protection is provided by the thermal-magnetic protection elements incorporated in the motor circuit-breaker. The magnetic elements (short-circuit protection) have a non-adjustable tripping threshold, fixed at 13 times the maximum setting current of the thermal trips. The thermal elements (overload protection) include automatic compensation for ambient temperature variations. The rated operational current of the motor is displayed by means of a graduated / calibrated knob. All live parts are protected against direct finger contact from the front panel. Personal protection is also provided. The undervoltage trip allows the circuit-breaker to de-energize in the event of an undervoltage condition. The user is therefore protected against sudden starting of the machine when normal voltage is restored, since the Start button I has to be pressed to restart the motor. The shunt trip provides remote tripping of the circuit-breaker. These circuit breakers are suitable for isolation. The start button can be padlocked in stop position in open execution unit. Connection The MPCBs are designed for connection by screw clamp terminals. Mounting These motor circuit-breakers can be mounted by screw fixing or clip on mounting on symmetrical, asymmetrical or combination Din-rail. FEATURES HAVELLS MB2 series motor protection circuit breaker effectively combines control & protection lending greater efficiency & flexibility through various functions, accessories & compact design Compact size & space saving Close overload & short circuit protection High breaking capacity Sensitive to single phasing Visual fault indication Simple & easy installation Wide range of accessories Available in open execution / in plastic enclosure 4

conformity IS / IEC 60947-2 & IS / IEC 60947-4-1 Utilization category A (Circuit breaker) / AC-3 (Motor duty) Rated thermal current range (Ith) A 0.

5 PARTS IDENTIFICATION Finger safe terminals Front aux. contact Current setting dial Mounting on DIN-rail Dial cover Start push button Side aux. contact Dial cover lock device Test trip device Pad locking (off position) Stop push button Identification label Compact frame size (45 mm) TECHNICAL INFORMATION Parameters Type MB-2 Standard conformity IS / IEC & IS / IEC Utilization category A (Circuit breaker) / AC-3 (Motor duty) Rated thermal current range (Ith) A Rated operational voltage V 690 Rated insulation voltage V 690 Rated operational frequency Hz 50 / 60 Rated impulse with stand voltage kv 6 Breaking capacity (Icu) upto 4kW / 5.5-9kW / 15kW ka 100 / 15 / 10 Breaking capacity (Ics % of Icu) upto 4kW / kW / 9kW / 11kW % 100 / 50 / 40 / 50 Power dissipated per pole W 2.5 Mechanical life (C.O.) No.of ops. 0.1 million Duty class (Max. operating rate) C.O. / hr 25 Rated duty Continuous Degree of protection open / enclosed IP-20 / IP-65 Shock resistance 30 gn-11ms Vibration resistance 5 gn Ambient temperature range C -20 to +60 Max. operating altitude m 2000 Suitable for isolation Yes Phase failure sensitivity Yes Operating position 90 0 on either side off normal vertical mounting plane Terminal capacity Solid cable (Max.) Sq. mm 2 x 6 Flexible cable (Max.) Sq. mm 2 x 6 Tightening torque N.m. 1.7 Weight Kg Dimension mm 44.5 x 89 x

6 TECHNICAL INFORMATION Add on Accessory Type Aux. Contact Fault Signalling Contact Side mounted Front mounted Side mounted Contact configuration (1NO + 1NC) / 2NO (1NO + 1NC) / 2NO 1NO / 1NC Rated insulation voltage ( Ui ) V Rated thermal current ( Ith ) A Utilisation Category AC 15 AC 15 AC 14 Rated operation voltage ( Ue ) V 110 / 240 / / / 240 Rated current A 4.5 / 3.3 / / / 0.3 Mechanical life ( Close - open ) Ops. 1,00,000 1,00,000 1,000 Number of cables / Conductor Cable size (max.) Sq. mm TECHNICAL INFORMATION Add on Accessory Type Under Voltage Trip (UVT) Shunt Trip ( ST) Side mounted Side mounted Rated insulation voltage (Ui) V Operation current V Un Un Drop out voltage V Un Un Power consumption (inrush) VA Power consumption W Power consumption (sealed) VA Power consumption W Operating time ms Number of cables / Conductor 1 / 2 1 / 2 Cable size (Max.) Sq. mm Tightening torque Nm Mechanical life (Close - open) Ops. 1,00,000 1,00,000 6

7 MOTOR KW RATING & CURRENT SETTING RANGE 3-phase motor rating AC-3 duty 415 V, 50Hz Thermal Current Setting range Magnetic tripping current kw HP Icu (ka) lcs (%) A A Type MB MB MB MB MB MB MB MB MB MB MB MB MB MB MB2-32 DIMENSION (in mm) X X X - Electrical clearance = 40 mm Standard screw mounting Mounting on (35 x 7.5) Din rail 7

8 TIME - CURRENT CHARACTERISTICS 10,000 1, Time (sec) x the setting current (Ir) 1) 3 poles from cold state 2) 2 poles from cold state 3) 3 poles from hot state LET THROUGH ENERGY (I 2 T) CHARACTERISTICS Thermal limit on short circuit (in magnetic operating zone) Sum of I 2 dt (ka 2 sec) Prospective lsc (ka) (1) A (2) A (3) A (4) A (5) 9-14 A (6) 6-10 A (7) A (8) A (9) A (10) A Sum of I 2 dt = f (prospective lsc) at 1.05 Ue = 435 V 8

9 ADD ON ACCESSORIES Under voltage trip MB2 - UV Side Aux. Contact SM11 / SM20 Shunt Trip MB2 - ST Fault Signalling Contact FC1010 / FC1001 Front Aux. Contact FM11 / FM20 Enclosure MB2 - E CIRCUIT DIAGRAMS (1NO + 1NC) (2NO) (1NO + 1NC) (2NO) C C2 trip (1NO) (1NC) 9

ORDERING INFORMATION Note: MB2-22 provide on request Relay Range Type Cat. No. 0.1-0.16 MB2-01 IHPMPBA0A0 0.16-0.25 MB2-02 IHPMPBB0B0 0.25-0.4 MB2-03 IHPMPBC0C0 0.4-0.63 MB2-04 IHPMPBD0D0 0.

10 ORDERING INFORMATION Note: MB2-22 provide on request Relay Range Type Cat. No MB2-01 IHPMPBA0A MB2-02 IHPMPBB0B MB2-03 IHPMPBC0C MB2-04 IHPMPBD0D MB2-05 IHPMPBE0E MB2-06 IHPMPBF0F MB2-07 IHPMPBG0G MB2-08 IHPMPBH0H MB2-10 IHPMPBJ0J MB2-14 IHPMPBK0K MB2-16 IHPMPBL0L MB2-20 IHPMPBM0M MB2-21 IHPMPBN0N MB2-22 IHPMPBQ0Q MB2-32 IHPMPBP0P0 ADD ON ACCESSORIES Accessory Type Cat. No. Side aux. contact (1NO+1NC) MB2 - SM11 ISPMASM011 Side aux. contact (2 NO) MB2 - SM20 ISPMASM020 Front aux. contact (1NO+1NC) MB2 - FM11 ISPMAFM011 Front aux. contact (2NO) MB2 - FM20 ISPMAFM020 Fault signalling contact (1NO) MB2 - FC1010 ISPFC010 Fault signalling contact (1NC) MB2 - FC1001 ISPFC001 Shunt trip 110 V 220 V 380 V / 415 V MB2 - ST1 MB2 - ST2 MB2 - ST3 ISPST110 ISPST220 ISPST415 Under voltage trip 110 V 220 V 380 V / 415 V MB2 - UV1 MB2 - UV2 MB2 - UV3 ISPUV110 ISPUV220 ISPUV415 MPCB Enclosure (IP 65) MB2 - E IHPMB2 E0 10

11 REGIONAL BRANCH OFFICES NORTH - REGIONAL OFFICE : Delhi : QRG Towers, 2D, Sector-126, Expressway, Noida Noida : Tel: , Fax: Chandigarh : Tel: , Fax: , Dehradun : Tel: , Haryana : Tel: / 853, Fax: Noida : Tel: / , Fax: Ludhiana : Tel: / 6024, Fax: Jammu : Tel: , Fax: Jaipur : Tel: , Fax: Lucknow : Tel: , Kanpur : Tel: Airtel: /52/53, /129/130, Fax: EAST - REGIONAL OFFICE : Kolkata : ICC Tower, 5th Floor, 4 India Exchange Place, Kolkata Kolkata : Tel: /52, Fax: Bhubaneshwar : Tel: , , , Fax: Guwahati : Tel: , , Fax: Siliguri : Tel: (RIM) Jamshedpur : Tel: , Patna : Tel: , , Telefax: WEST - REGIONAL OFFICE : Mumbai : 302, Boston House, 3rd Floor Suren Road, CTS No. 260/261, Andheri (E), Mumbai Mumbai : Tel: Ahmedabad : Tel: , , Fax: Indore : Tel: , (Airtel), Fax: Rajkot : Tel: / Nagpur : Tel: , , Pune : Tel: /14 Raipur : Tel: / 01, Telefax: Surat : Telefax: SOUTH - REGIONAL OFFICE : Chennai : Block 1, A & D Wing, Shakthi Towers, 7th Floor, 766, Annna Salai, Chennai Chennai : Tel: , Fax: Bangalore : Tel: , / 2 / 3 /4, Fax: Coimbatore : Telefax: , , Hyderabad : Tel: , , , /0408/6401/6402, Fax: Kochi : Tel: , , , Fax: Vishakapatnam : Tel: , Fax: REPRESENTATIVE OFFICES Goa Solapur Gwalior Jabalpur Hubli Davanagere Gulbarga Mysore Trichny Kathmandu Sambalpur Jalandhar Bhopal Calicut Madurai Trivandrum

ACB MCCB Digital MCCB MCCB Panel Board Euroload Change Over Switch Submersible & Motor Starter Switch Disconnector Fuse Load Changeover Switch Camlock fuse holder HRC Fuse Motor Low Voltage Capacitor

Current details should therefore be checked with Havells Group. ZHIMC00008/FEB2011 Havells India Ltd. Corp Office: QRG Towers, 2D, Sector-126, Expressway, Noida-201304 (U.P), Ph.

12 ACB MCCB Digital MCCB MCCB Panel Board Euroload Change Over Switch Submersible & Motor Starter Switch Disconnector Fuse Load Changeover Switch Camlock fuse holder HRC Fuse Motor Low Voltage Capacitor Although every effort has been made to ensure accuracy in the compilation of the technical detail within this publication. Specifications and performance data are constantly changing. Current details should therefore be checked with Havells Group. ZHIMC00008/FEB2011 Havells India Ltd. Corp Office: QRG Towers, 2D, Sector-126, Expressway, Noida (U.P), Ph , Consumer Care No.: (Tollfree), (Landline) (All Connections) Join us on Facebook at and share your ways to save the planet!

3 - Protection components Motor circuit-breakers

3 - Protection components Motor circuit-breakers Contents 0 - Protection components Motor circuit-breakers protection components for the motor protection Thermal-magnetic motor circuit-breakers Selection guide..............................................page